Measuring-pump



(No Model.) r 3 Sheet-Sheet 1. 'H. E. MAROHAND.

' MEASURING PUMP.

No. 275,680. Patented Apr. 10,1883.

3 Sheets-Sheet 2.

E. MARGHAND.

MEASURING PUMP.

mvew Zor fire/ 1. flanzazul (No Model.)

' 3 Sheets-Sheet 3.v

H. E. MAROEAND.

MEASURING PUMPF No. 275,680

. Patented Apr. 10,1883.

x. M I 1 u II J Inwmior flarezazul UNITED STATES PATE T OFFICE.

.HENRY E. MAROHAND, OF ALLEGHENY CITY, PENNSYLVANIA.

MEASURING-PUMP.

SPECIFICATION forming partof Letters Patent No. 275,680, dated April 10,1883.

' Application filed January 11, 1883. (No model.) I

To all whom it may concern.-

Be it known that I, HENRY E. MARGHAND,

' a citizen of the United States, residing-at Allegheny City, Alleghenycounty, Pennsylvania, have invented new aud'useful Improvements inMeasuring-Pumps, of which the following is a specification.

The present invention relates to improvements upon the measuring-pumpforming the subject-matter of Patent- No. 264,312, granted to me on the12th day of September, 1882.

The object of the invention is to provide sim-' ple and ett'ective meansfor packing the shaft or arbor which serves to impart a reciprocatingmovement to the double-headed piston, to

' adjust from the outside of the pump-cylinder the eccentric orwrist-pin block which serves to throw the piston back and forth,thisad-' justment, being for the purpose of varying the throw or movement ofthe piston, and, furthermore, to provide a piston of a.uovelcous'truction which possesses decided advantages over the pistonused in the pump heretofore patented to me.

To these ends the invention consists inthe construction and combinationof devices which will be fully described hereinafter, and then pointedout in the claims.

In the drawings, Figure 1 is a perspective view, showing the relativepositions of a barrel-measuring pump andvessel to be filled.

Fig. 2 is a vertical sectional view taken trans-i vers'ely throughameasuring-pump construct-4 ed according to the present invention-f Fig.3

is a longitudinal sectional view taken vertically-i through the side .ofthe measuring-pump on{ which thepiston-operatin g devices are located.Fig.4 is a perspective view of the doubleheaded piston, showing itsliquid-chamber and vertically-movable valves. Fig. 5 is a. longitudinalsectional view of the piston. Figs. 6, 7 8, and 9 are detached views ofthe packingplug, piston-operatiu g block, and tapering bolt.

The letter A designates the pump-cylinder, which is closed at its endsby the detachable heads B, securely fastened to the ends of thecylinder. The cylinder has the bottom chamber, a, into which the liquidenters from the barrel or other reservoir through thecentrallylocatedtube b. The end heads, B, are provided with verticalchambers c, which communicate at all times with the inlet-chamber a, asis clearly shown in Fig; 3, while the communication of these chamberswith the pistonchamber is through ports d, normally closed 5 byinwardly-movable valves (3. .The stems of these valves project intotubular projections on the cylinder-heads, and are encircled by,spriugsf, for pressing the valves into their seats.

The parts just described are also found in my previous patent, and neednot be more precisely described.

The working-chamber of the cylinder contains a double-headed piston,D,which, instead 6 of being constructed of twoindependent heads rigidlyconnected together by bolts and provided with horizontally-movablespring pressed valves, is in the present instance constructed -of asolid cylindrical body, apertured or retering liquid and held closed bytheir own;

weight. The side of the piston opposite the -liquid-chamber is providedwith a recess, 'i, having curved sides, as is shown in Fig.3,iapd this;recess is traversed vertically by a groove, 8 5 j, which extends fromthe top to'the based :5 the piston.-: 5A block,'K, operates intheire'cess t of the piston, and a wrist-pin, L, on the inher face ofsaid block, moves up and down in the groovej, also formed in saidpiston. The block K has a square or quadrangular seat or recess, M, onthe face thereof adjoining the cylinder, and a slot, N, extending acrossthe inuer or piston side of the block, opens into said recess or seat,and is bordered at its ends 5 by the short grooves O, as is clearlyshown in Figs. 8 and 9. A cylindrical extension or tube,

P, forming part of the side of the shell of the cylinder, receives acylindrical plug, Q, which has a conical enlargement or swell,R, nearits to; outer end and a square projection, S, at its inher end. Theconical enlargement R of the plug is seated in the flaring orcorrespondingly-shaped outer end or mouth of the tube 1, and ascrew-threaded cap, T, applied to the end of said tube, has an outerflange, which bears against the enlargement 1t and serves to press thesame into its seat. The flaring seat of the tube and thecorrespondinglyshaped enlargement of the plug Q. produce a liquid-tightjoint, and no additional packing devices are required to guard againstthe working out of liquid through the tube on the cylinder. The plug isextended beyond the latter and receives the handle or crank U,which issecurely fastened to the plug for the purpose of turning the same. Thesquare projection S at the inner end of the plug tits into the recess orseat M of the wrist-pin or eccentric block, and these parts are firmlylocked to each other, so as to turn together, by means of a taperingstem or bolt,V, which passes through an axial bore of the plug, and isfirmly secured in place by a nut, 0, applied to its screwthreaded outerend, or the part thereof projecting beyond the plug. The stem or bolt Vhas an cccentricalIy-arranged pin or stud, \V, at its inner end,which ispassed through the recess M and slot), and lies on the inner orwrist-pin side of the block K. The recess M is made somewhat longer thanthe projection S, so that the block K can be adjusted or moved up anddown for varying the throw of the piston, according to the exigencies ofthe case. It will be observed that the stem V is loosened in the plugwhen the outer nut, 12, is properly turned, whereupon the block K can beadjusted or moved upanddown on the square end of the plug through themedium of the eccentric end portion of the stem. The block having beenadjusted so as to set the wrist-pin higher or lower in the workinggroovein the piston, the nutisagain tightened for locking the block, stem, andplug together, so as to cause these parts to turn together.

The principle of operation of a pump constructed according to thepresent invention is the same as in my previous patent, it beingmanifest that as the piston moves from either head of the cylinder thevacuum created in the cylinder will cause the valve at the receding endof the cylinder to open, as is shown in Fig. 3, and permit liquid toenter the cylinder, and during the return-stroke of the piston theliquid which has thus entered is caused to Youter the chambered pistonby the opening of the upwardly-movable valve and pass from the pistonthrough the discharge-pipe W, which communicates with the chamber in thepiston during its entire stroke. The lengthening or shortening of thestroke of the piston by the means described will permit the amountofliquid received into the cylinder and ejected therefrom to be varied, aswill be manifest.

Having thus described my invention, what I claim is- 1. The combinationof a double-headed piston having a segmental liquid-chamber, inletportsopening into said chamber through the heads of the piston, andvertically-movable valves fitted in said ports, with suitablemeans forreciprocating the piston, and a cylinder having end inlet-valves anddischarge-pipe communicating with the chambered piston, substantially asand for the purpose set forth.

2. The combination of a reciprocating piston having a vertical recessandgroove, and a block with a wrist-pin oran eccentricarranged therein,with a cylinder having inlet and discharge ports, and an arbor or shaftcarrying said block or eccentric, substantially as and for the purposeset forth.

3. The combination of the plug having a conical ortapering enlargementand asuitable handle, and a piston-cylinder havinga tubular extensionprovided with a daring mouth, with an eccentric or wrist-pin block andareciprocating piston, substantially as and for the purpose set forth.

4. The combination of an adjustable eccentric or wrist-pin block havingarectangular recess and slot communicating therewith, the plug providedwith an axial bore and rectangular inner end projection, and thetapering stem having an end stud or pin with the recessed piston, andthe cylinder having a tube for the reception of the plug, substantiallyas and for the purpose set forth.

In testimony whereof Ihave hereunto set my.

hand in the presence of two subscribing witnesses.

HENRY E. MARCHAND. -Witnesses:

JAMES L. Noanrs, J. A. RUTHERFORD.

